#!/bin/sh

#################################################################################
#
#   Lynis
# ------------------
#
# Copyright 2007-2013, Michael Boelen
# Copyright 2007-2017, CISOfy
#
# Website  : https://cisofy.com
# Blog     : http://linux-audit.com
# GitHub   : https://github.com/CISOfy/lynis
#
# Lynis comes with ABSOLUTELY NO WARRANTY. This is free software, and you are
# welcome to redistribute it under the terms of the GNU General Public License.
# See LICENSE file for usage of this software.
#
#################################################################################
#
# Home directories
#
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#
    InsertSection "Home directories"
#
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#
    # Ignore some top level directories (not the sub directories below)
    IGNORE_HOME_DIRS="/bin /boot /cdrom /dev /etc /home /lib /lib64 /media /mnt
                      /opt /proc /sbin /selinux /srv /sys /tmp /usr /var"
#
#################################################################################
#
    # Test        : HOME-9302
    # Description : Create list with home directories
    Register --test-no HOME-9302 --weight L --network NO --category security --description "Create list with home directories"
    if [ ${SKIPTEST} -eq 0 ]; then
        # Read sixth field of /etc/passwd
        LogText "Test: query /etc/passwd to obtain home directories"
        FIND=$(${AWKBINARY} -F: '{ if ($1 !~ "#") print $6 }' /etc/passwd | ${SORTBINARY} -u)
        for I in ${FIND}; do
            if [ -d ${I} ]; then
                LogText "Result: found home directory: ${I} (directory exists)"
                Report "home_directory[]=${I}"
            else
                LogText "Result: found home directory: ${I} (directory does not exist)"
            fi
        done
    fi
#
#################################################################################
#
    # Test        : HOME-9310
    # Description : Check for suspicious shell history files
    Register --test-no HOME-9310 --weight L --network NO --category security --description "Checking for suspicious shell history files"
    if [ ${SKIPTEST} -eq 0 ]; then
        if [ ! -z "${HOMEDIRS}" ]; then
            if [ "${OS}" = "Solaris" ]; then
                # Solaris doesn't support -maxdepth
                FIND=$(${FINDBINARY} ${HOMEDIRS} -name ".*history" ! -type f -print)
            else
                FIND=$(${FINDBINARY} ${HOMEDIRS} -maxdepth 1 -name ".*history" ! -type f -print)
            fi
            if [ -z "${FIND}" ]; then
                Display --indent 2 --text "- Checking shell history files" --result "${STATUS_OK}" --color GREEN
                LogText "Result: Ok, history files are type 'file'."
            else
                Display --indent 2 --text "- Checking shell history files" --result "${STATUS_WARNING}" --color RED
                LogText "Result: the following files seem to be of the wrong file type:"
                LogText "Output: ${FIND}"
                LogText "Info: above files could be redirected files to avoid logging and should be investigated"
                ReportWarning ${TEST_NO} "Incorrect file type found for shell history file"
            fi
            LogText "Remarks: History files are normally of the type 'file'. Symbolic links and other types can be riskful."
        else
            Display --indent 2 --text "- Checking shell history files" --result "${STATUS_SKIPPED}" --color WHITE
            LogText "Result: Homedirs is empty, test will be skipped"
        fi
    fi
#
#################################################################################
#
    # Test        : HOME-9314
    # Description : Check if non local paths are found in PATH, which can be a risk, but also bad for performance
    #               (like searching on a filer, instead of local disk)
    #Register --test-no HOME-9314 --weight L --network NO --category security --description "Create list with home directories"
#
#################################################################################
#
    # Test        : HOME-9350
    # Description : Scan home directories for specific files, used in different tests later
    # Notes       : For performance reasons we combine the scanning of different files, so inode caching is used
    #               as much as possible for every find command
    # Profile opt : ignore_home_dir (multiple lines allowed), ignores home directory
    if [ ! -z "${REPORTFILE}" ]; then PREQS_MET="YES"; else PREQS_MET="NO"; fi
    Register --test-no HOME-9350 --preqs-met ${PREQS_MET} --weight L --network NO --category security --description "Collecting information from home directories"
    if [ ${SKIPTEST} -eq 0 ]; then
        IGNORE_HOME_DIRS=$(${GREPBINARY} "^config:ignore_home_dir:" ${PROFILE} | ${AWKBINARY} -F: '{ print $3 }')
        if [ -z "${IGNORE_HOME_DIRS}" ]; then
            LogText "Result: IGNORE_HOME_DIRS empty, no paths excluded"
        else
            LogText "Output: ${IGNORE_HOME_DIRS}"
        fi
    fi
#
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#

WaitForKeyPress

#
#================================================================================
# Lynis - Security Auditing and System Hardening for Linux and UNIX - https://cisofy.com
